Question

The average age of 3 boy is 12 the average age of 2 of them is 13 years find the age of the third boy

Answer 1

Answer:

10 years.

Step-by-step explanation:

Avg age of three boys=12

so, sum of ages of three boys=12*3=36. .....(1)

Given that

Avg age of two boys =13

so, sum of ages of two boys=13*2=26. ......(2)

Subtracting eqn 2 from 1

36-26

=10

Therefore the age of third boy is 10 years